102019855 has 16 divisors (see below), whose sum is σ = 140258304. Its totient is φ = 69783840.

The previous prime is 102019843. The next prime is 102019867. The reversal of 102019855 is 558910201.

It is an interprime number because it is at equal distance from previous prime (102019843) and next prime (102019867).

It is not a de Polignac number, because 102019855 - 2⁵ = 102019823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11704 + ... + 18466.

It is an arithmetic number, because the mean of its divisors is an integer number (8766144).

Almost surely, 2^102019855 is an apocalyptic number.

102019855 is a deficient number, since it is larger than the sum of its proper divisors (38238449).

102019855 is an equidigital number, since it uses as much as digits as its factorization.

102019855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7206.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 102019855 is about 10100.4878595046. The cubic root of 102019855 is about 467.2631875637.

The spelling of 102019855 in words is "one hundred two million, nineteen thousand, eight hundred fifty-five".